Question

Two bodies A of mass 1 Kg and B of mass 3 kg are dropped from heights of 16 m and 25 m, respectively.
The ratio of time taken by them to reach the ground is:
1)1:1
2)4:5
3)5:4
4)12:5
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Answer 1

to use this same equation into he calculation

Here, mass doesn't matter since the acceleration of the gravity acting on every object is same.

For object A,

s = ut + ½at²

16 = 0 + ½(10)(t²)

t² = 16 ÷ 5 = 3.2

t = √3.2 s

For object B,

s = ut + ½at²

25 = 0 + ½(10)t²

t² = 25 ÷ 5 = 5 ..